pan/bi: Remove more artefacts of 2-pass scheduling

A clause is, by definition, already scheduled.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5260>
diff --git a/src/panfrost/bifrost/compiler.h b/src/panfrost/bifrost/compiler.h
index e4d37a8..3ac958e 100644
--- a/src/panfrost/bifrost/compiler.h
+++ b/src/panfrost/bifrost/compiler.h
@@ -339,17 +339,10 @@
         struct list_head link;
 
         /* A clause can have 8 instructions in bundled FMA/ADD sense, so there
-         * can be 8 bundles. But each bundle can have both an FMA and an ADD,
-         * so a clause can have up to 16 bi_instructions. Whether bundles or
-         * instructions are used depends on where in scheduling we are. */
+         * can be 8 bundles. */
 
-        unsigned instruction_count;
         unsigned bundle_count;
-
-        union {
-                bi_instruction *instructions[16];
-                bi_bundle bundles[8];
-        };
+        bi_bundle bundles[8];
 
         /* For scoreboarding -- the clause ID (this is not globally unique!)
          * and its dependencies in terms of other clauses, computed during